A new type of square columnar liquid crystalline phases formed by facial amphiphilic triblock molecules

Journal of the American Chemical Society
Bin ChenCarsten Tschierske

Abstract

A series of three novel liquid crystalline amphiphilic molecules is reported which are composed of three incompatible molecular parts, a rigid terphenyl core, two lipophilic decyloxy chains in the terminal 4- and 4' '-positions, and a polar group in the lateral 2'-position. The polar group comprises a polyether chain, an amide group, and a polyhydroxyalkyl end group (1-acylamino-1-deoxy-d-sorbitol derivatives). The self-organization of these compounds was studied by polarized light microscopy, differential scanning calorimetry, and different X-ray diffraction techniques. These investigations confirm a novel liquid crystalline phase with a square 2D-lattice (square columnar mesophase, plane group p4mm). This structure is built up by a set of three distinct columns, namely columns containing the polar lateral groups, columns incorporating the alkyl chains, and ribbons of the rodlike terphenyl units. The calamitic cores form walls bounding square-shaped channels occupied by the microsegregated polar lateral chains. The lipophilic columns containing alkyl chains are at the corners interconnecting the aromatic rods end-to-end.

References

Feb 22, 2003·Science·Goran UngarWook-Dong Cho
Mar 12, 2004·Nature·Xiangbing ZengJamie K Hobbs

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Citations

Oct 8, 2013·Interface Focus·C TschierskeG Ungar
Sep 27, 2006·Angewandte Chemie·Sang Hyuk SeoGregory N Tew
Sep 5, 2007·Angewandte Chemie·Marko PrehmCarsten Tschierske
Aug 13, 2013·Angewandte Chemie·Carsten Tschierske
Apr 16, 2013·Physical Review Letters·Ying Jiang, Jeff Z Y Chen
Jul 12, 2011·Physical Chemistry Chemical Physics : PCCP·G G AlexanderH Zimmermann
May 4, 2011·Journal of the American Chemical Society·Xiaohong ChengCarsten Tschierske

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